import java.io.*; 
import java.net.*; 

public class socketserver {
	
		  public static void main(String argv[]) throws Exception 
		    { 
		      String clientSentence; 
		      String capitalizedSentence; 

		      ServerSocket welcomeSocket = new ServerSocket(4567); 
		  
		      while(true) { 
		  
		            Socket connectionSocket = welcomeSocket.accept(); 

		           BufferedReader inFromClient = 
		              new BufferedReader(new
		              InputStreamReader(connectionSocket.getInputStream())); 
		           
		           DataOutputStream  outToClient = 
		                   new DataOutputStream(connectionSocket.getOutputStream()); 

		                 clientSentence = inFromClient.readLine(); 

		                 capitalizedSentence = clientSentence.toUpperCase() + '\n'; 

		                 outToClient.writeBytes(capitalizedSentence); 
		              } 
		          } 
		      } 

